• My shops occupied by the tenant

Hello,

My father rented a shop 25 years ago. The rent agreement is not renewed since then, also my dad seems to have misplaced the agreement. The tenant stopped paying the rent after 2005 and he closed the shop in 2011, but is not ready to vacate the shop. People say even if we file a case, we will lose because we do not have rent agreement and also the tenant by crook transferred electricity to his name.

Is there anything we can do? Are there any chances of us winning the case? Also, shouldn't rent agreement be renewed every year? Since the shop is close and he doesn't even pay rent, I should get the shop? Please help!